The London Diplomatic Association, established in 1964, provides members with an opportunity to gain a deeper insight into Britain's political, economic and social affairs.
It hired Executive Gold Club to be its marketing and events management company in 1999.
The London Diplomatic Association has around 3,000 members and the contacts are provided under a 12-month licence agreement at a cost of £2,250.
Sue Dyer, the director of Caspian, said: "We expect the list to have a broad range of appeal. It is ideal for corporate travel, stationery, furniture, technology and telecoms."
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